Valve



Nov. 9, 1926. 1,606,500

W. L. BODMAN VALVE Filed Nov. 21, 1925 v 2 f f www f I I 1 ENroR. M ATTORNEY Patented Nov. 9, 1926.

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PATE NT FIC WALTER LGHT IBODMAN, F .NEW YORK, N. Y., ASSIGNVOR,`BY .'LVIESNEYASSIGNMENTS, TO THE ROYALTIESNCORPORATION, .A CURPGRAEON` 0F NEW YORK;

VALVE.- l

Application filed "November My inventionrelates'to improvements inA valves, and more particularlyin whatl 'I termvv an expansion valve, as it has `to Vdeal Aparticularly with gases which arevery highlygy compressed and .which are liberated at briefe intervals ,at'very highvelocity and which therefore expand rapidly. Such gases must 'be'nicely controlled, and they are usually heat from the surrounding atmosphere, andl the valve itself is quite likely to become Moreover the valve quick action to .pre- An example.l of the frosted and` to' stick. must be capable of very vent the waste. of gas.A

use referred to is .for liberating .high pressure `carbon vdioxide to an expansion chamber. Y f

The obgectoff'my finvention is .to produce a'quiclt acting positive needle valve which is adapted to functionas aboveioutlined,which? has its whole hodyand shank insulated, and which is connected with a heating medium so that for the brief interval it is exposed to the expanding gases there will be no danger of its sticking or frosting. My invention is also intended to produce a valve which can be held closed by pressure against the end of the valve, and which will instantly open when the closing pressure is removed. The advantages of the structure will be better understood from the following description.

Reference is to he hadto the accompany- .ing drawings forming a. part of this specification, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a plan view of the valve embodying my invention.

Figure 2 is a side elevation of the valve.

Figure 3 is a. longitudinal section thereof, and

Figure 4 is a cross-section on the line 4-4 of Figure 1.

The valve is provided with a suitable casing having on one side a threaded inlet nipple 11 which is shown provided with a lock nut 11', and at one end and at right angles to the nipple 11 is a. threaded nipple 12 adapted to couple to any desired object, as for example an expansion member. At the opposite end the casing'is elongated as shown at 13, this part beingpreferably in alignment with the part 12 for convenience of tonstruction, andthe part 13 is exteriorly 21, 1925. Serialv No. 70,508.

screw threaded. The above described-ifeaturesare common to manyvalves, and the conventional shape 1s preferred. rlhis shape.

also lends itself to my improvements, which comprise'the matters described below.-

Extending` longitudinally of the 1 casing 101- and in the center thereofis a'bodyHoff-heat and electricity insulating material 114 whichV .isheld in thefhorefof the-casing, and enter' ing this from the inlet nipple 11 isal trans` verse bore 15 which connectswith a veryy small dischargebore 16enlarged at-its outer; end as shown at 16A in Figure-3, and finallyx discharging through ythe bore,V 17 The -di'scharge bore 16 isclosedv by the needle valve 18,- the point of which enters the-bore,- and this needle valve is I as usual with needle i valves,- made on the; end off an-A extended shank 18. The shank 18 passes out through the gland at the end ofthe casinglO, and to this end the casing has an enlarged b'ore 2O,l the inner vpartl of Iwhich is screwthreaded to receive a nut 21, in-whichllare insulatingv washers 22, and within the bore 2O and outside the nut.21 are spaced washers 23 between which is an elastic stuiiing 24 of rubber or the like. The gland has nut 25 which screws to the threaded part 13 of the casing 10, and the nut has preferably a circular ange 26 at its outer end to serve as a guide for the spring 27 which is seated within the flange and encircles an insulating boss 28 on a casing 28; the latter comprising spaced sides and 30 and a body portion 29 formed preferably of insulating material. As shown clearly in Fig. 3 the shank 18 extends through an opening in nut 25,v through the boss 28 and is connected to the side 30 of casing 28 by heading or upsetting the end of said shank, as shown at 19.

The casing 28 is intended to contain the heating element, which can most conveniently be an electric heating element 32, which is not shown in detail as any suitable heating element can be used, as for example nichrome wire, and the casing is provided with terminals 31 and 31. It also has preferably on the back side, an insulated abutment 83 contained in a guide flange 3&1-, so that some object, as for example a lever, can press against the abutment 33 and so press the casing 29 and shank 18 of the valve 18 into position to hold the valve closed, and when the pressure is removed,

the spring 27 Will open the valve, While the heating element Will prevent it from being stuck by freezing. @bviously the valve might Work in the reverse direction, that is being spring closed and opened by external pressure, Without affecting the invention, and the particular construction of the valve can be departed :trom in many Ways Vithout changing the character of the invention.

I claim l. A valve of the character described comprising a casing having a suitable inlet and outlet, the latter being located in an electrically insulating body, and a needle-valve slidable in the insulating body and seated in the valve outlet.

2. A needle valve having an electrically insulated shank, and means for. heating the shank and valve.

3. An article of manufacture comprising in combination With a needle valve an electric heating element secured to the stem thereof outside of the valve casing, to heat said valve and valve stem.

4. A valve comprising a casing having an internal heat and electric insulating' core with an inlet'and outlet bore therein, a needle valve movable in the core and closing the aforesaid bore, and means for heating the valve.

5. A valve comprising a casing having an electrically insulated core with an inlet and outlet bore therein, a needle valve insulated in the core and arranged to close the bore, the shank of the valve extending outward through the casing, and a heating element connected with the shank.

6. A valve comprising'a casing having an electrically insulating core With an inlet and outlet bore therein, a needle valve movable in the core and arranged to close the bore, the shank of the valve extending` outward through the casing, means for moving the shank and valve endWise, and a heating element connected With the outer end of the shank.

7. A va ve according to claim 6, turther characterized by having the heating element contained in a casing which is attached to the outer end of the valve shank.

8. An article ot manufacture comprising in combination with a valve having a stem, a casing connected to said stem and having a heating element therein to heat said stem.

9. An article ot manufacture comprising in combination With a valve having a stem, a casing connected to said stem and movable With said stem and electric heating means in said casing to heat said stem and said valve.

In testimony whereof, I have signed my name to this specification this 20th day of November, 1925.

VALTER LIGHT BODMAN. 

